某隔震展馆水平限位设计与抗震性能研究

RESEARCH ON HORIZONTAL LIMIT DESIGN AND SEISMIC PERFORMANCE OF AN ISOLATED EXHIBITION HALL

限位装置能够降低隔震结构大震下倾覆概率。研究结合某4层框架展馆,进行水平隔震与限位设计;选取适用于隔震展馆的限位装置参数限位间距(D)、限位刚度(K),建立限位-隔震结构分析模型,结合顶层加速度峰值、层加速度、层位移、层剪力峰值等指标展开抗震性能分析。结果表明,限位隔震结构与传统结构相比能降低上部加速度、层剪力响应,限位隔震结构层剪力峰值较隔震结构有放大现象,限位装置工作性能良好。

Since the limit device can reduce the overturning probability of isolated structure under strong earthquake,the horizontal isolation and limit design are carried out based on a 4-story frame Pavilion.The analysis model of limit isolation structure is established with the parameters of limit spacing(d)and limit stiffness(k)suitable for the isolated pavilion,and the seismic performance analysis is carried out combining with the indexes of peak acceleration of top floor,floor acceleration,story displacement and floor shear force.The results show that,compared with the traditional structure,the limited isolation structure can reduce the upper acceleration and floor shear response,moreover,the peak shear force of the limited isolation structure is larger than that of the isolated structure,and the performance of the limiting device is good.The isolation technology provides the optimal selection strategy for the cultural relics exhibition hall.